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Phy 1010 -Chapter 4 Questions 1) A person pulls a block across a rough horizontal surface at a constant speed by applying a force F. The arrows correctly indicate the directions, but not necessarily the magnitudes of the forces on the block. Which of the following must be true? b) F> fk and N w c) F fk and N> w d) F> fk and N -W e) None of the above
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